JJohnRudnicki15-MoonstoneForum|Forum|5 years agoApril 30, 2021QuestionReturn Value of this function must match the problem sizeForum|Forum|5 years agoApril 30, 20211 reply3788 viewsWhat does this mean? I could not find it in the list of error messages. The attached program was working until I set a_1, b_1 and d_1 = 0.1_PeriodicConabd.zipMathcad UsageCalculus_Derivatives